package com.xiaoyang.controller;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.xiaoyang.common.BaseContext;
import com.xiaoyang.common.R;
import com.xiaoyang.domain.ShoppingCart;
import com.xiaoyang.service.ShoppingCartService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.*;

import java.util.List;

/**
 * @auther XiaoYang
 * @DATE 2022/12/18-13:15
 */
@RestController
@Slf4j
@RequestMapping("/shoppingCart")
public class ShoppingCartController {
    @Autowired
    private ShoppingCartService shoppingCartService;

    /**
     * 添加购物车
     * @param shoppingCart
     * @return
     */
    @PostMapping("/add")
    public R<ShoppingCart> add(@RequestBody ShoppingCart shoppingCart){
        log.info("购物车数据:{}",shoppingCart);
        //设置用户id，指定当前是哪个用户的购物车数据
        Long currentId = BaseContext.getCurrentId();
        shoppingCart.setUserId(currentId);

        LambdaQueryWrapper<ShoppingCart> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(ShoppingCart::getUserId,shoppingCart.getUserId());

        //查询当前菜品或者套餐是否在购物车中
        Long dishId = shoppingCart.getDishId();
        if (dishId!=null){
            //添加到购物车的是菜品
            queryWrapper.eq(ShoppingCart::getDishId,shoppingCart.getDishId());

        }else {
            //添加到购物车的套餐
            queryWrapper.eq(ShoppingCart::getSetmealId,shoppingCart.getSetmealId());
        }

        ShoppingCart cartServiceOne = shoppingCartService.getOne(queryWrapper);

        if (cartServiceOne!=null){
            //如果已经存在，就在原来数量基础上加一
            Integer number = cartServiceOne.getNumber();
            cartServiceOne.setNumber(number + 1);
            shoppingCartService.updateById(cartServiceOne);
        }else {
            //如果不存在，则添加到购物车，数量默认就是一
            shoppingCart.setNumber(1);
            shoppingCartService.save(shoppingCart);
            cartServiceOne = shoppingCart;
        }

        BaseContext.close();
        return R.success(cartServiceOne);
    }

    /**
     * 查看购物车
     * @return
     */
    @GetMapping("/list")
    public R<List<ShoppingCart>> list(){
        log.info("查看购物车");

        LambdaQueryWrapper<ShoppingCart> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(ShoppingCart::getUserId,BaseContext.getCurrentId());
        queryWrapper.orderByAsc(ShoppingCart::getCreateTime);

        List<ShoppingCart> list = shoppingCartService.list(queryWrapper);

        BaseContext.close();
        return R.success(list);
    }

    @PostMapping("/sub")
    public R<ShoppingCart> sub(@RequestBody ShoppingCart shoppingCart){
        LambdaQueryWrapper<ShoppingCart> queryWrapper = new LambdaQueryWrapper<>();
        ShoppingCart one = null;
        if (shoppingCart.getDishId()!=null){
            //他是dishId
            queryWrapper.eq(ShoppingCart::getDishId,shoppingCart.getDishId());
            one = shoppingCartService.getOne(queryWrapper);
        }else {
            queryWrapper.eq(ShoppingCart::getSetmealId,shoppingCart.getSetmealId());
            one = shoppingCartService.getOne(queryWrapper);
        }
        if (one.getNumber() == 1){
            shoppingCartService.remove(queryWrapper);
            one.setNumber(0);
        }else {
            //设置新的number
            Integer number = one.getNumber();
            one.setNumber(number - 1);
            shoppingCartService.updateById(one);
        }



        BaseContext.close();
        return R.success(one);
    }

    /**
     * 清空购物车
     * @return
     */
    @DeleteMapping("/clean")
    public R<String> clean(){
        LambdaQueryWrapper<ShoppingCart> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(ShoppingCart::getUserId,BaseContext.getCurrentId());

        shoppingCartService.remove(queryWrapper);

        BaseContext.close();

        return R.success("清空购物车成功");
    }
}
